In my point of view praxie is super overpriced..
Wilhem, Nobrocybix, Lilith
All new releases and CRs
Griezzo has a mission,that's why he is OPriced
The most OPriced card in this game is.....Chill ...
Most new cards
Griezzo, Nobrocybix, Lillith, Wilhelm, Gil, Kenny, Vholt, Kolos...
Niva's expensive, but I wouldn't call her overpriced yet. If you go mono-Jungo, there are only two options for 4* (Buba and NIva), and there are only two options for DR (Pegh and Niva), so it's kinda hard to avoid using her even though she's not that great.